A Laboratory Investigation on Shear Strength Behavior of Sandy Soil: Effect of Glass Fiber and Clinker Residue Content

Abstract

Abstract:A study was undertaken to investigate the shear strength parameters of treated sands reinforced with randomly distributed glass fibers by carrying out direct shear test after seven days curing periods. Firstly, we studied the fiber content and fiber length effect on the peak shear strength on samples. The second part gives a parametric analysis on the effect of glass fiber and clinker residue content on the shear strength parameters for two types of uniform Algerian sands having different particle sizes (Chlef sand and Rass sand) with an average relative density Dr = 50%. Finally, the test results show that the combination of glass fiber and clinker residue content can effectively improve the shear strength parameters of soil in comparison with unreinforced soil. For instance, there is a significant gain for the cohesion and friction angle of reinforced sand of Chlef. Compared to unreinforced sand, the cohesion for sand reinforced with different ratios of clinker residue increased by 4.36 to 43.08 kPa for Chlef sand and by 3.1 to 28.64 kPa for Rass sand. The feature friction angles increased from 38.73° to 43.01° (+4.28°), and after the treatment, clinker residue content of soil evaluated to 5% (W RC = 5%).

Effect of Fiber Content on Mechanical Properties of Fiber-Reinforced CGF All-Solid-Waste Binder-Solidified Soil

“…In general, fibers have the advantages of high tensile strength and good dispersion, and they form an isotropic, high-tensile-strength composite with cementsoil [12][13][14][15][16]. The strength of fiber-reinforced, solidified soil is much greater than that of pure fiber-soil and solidified soil without fibers [17][18][19]. For example, the incorporation of PET fiber can effectively improve the tensile strength and durability of cement-based composite materials by providing corrosion resistance [20].…”

“…There is an optimum fiber content, where the strength increases with a fiber content below the optimum fiber content but decreases above the optimum fiber content [26]. The optimum fiber content is related to the material to be solidified and the fiber type [17,[27][28][29][30]. On the other hand, the interaction between fibers and soil has a significant effect on the reinforcement mechanism of fiber-reinforced, solidified soil.…”

Probabilistic Bearing Capacity of a Pavement Resting on Fibre Reinforced Embankment Considering Soil Spatial Variability

“…Thus it gives rise to the use of synthetic fibres as soil reinforcement. Many researchers have studied the effectiveness of using synthetic fibre-reinforced soil (Michalwoski and Cermak, 2002;Kumar et al, 2007;Tang et al, 2007;Consoli et al, 2010;Chen et al, 2015;Correia et al, 2015;Ates, 2016;Bouaricha et al, 2017;Cristelo et al, 2017;Sharma and Kumar, 2017). The reinforcing effects of fibres on the behavior of soils have been investigated numerically by several authors (Babu et al, 2007;Toh et al, 2017;Arora and Kumar, 2019;Sharma and Kumar, 2019;Wang et al, 2019).…”